Connectors, strings, fuses, surge protection, earthing and arc faults on the DC side.
6 in-depth guides
How rats, squirrels, monkeys and pigeons damage rooftop solar systems in India, the faults they cause, and proven prevention methods — conduit, cable trays, mesh skirts and bird deterrents — plus safe repair of chewed cables.
What DC arcs are, why they're more dangerous than AC arcs, the difference between series and parallel arcs, how arc fault detection (AFCI) works in inverters, and the installation practices that prevent arcing.
The earthing and lightning protection mistakes most often found on Indian solar rooftops — unbonded frames, shared or high-resistance earth pits, long SPD leads, missing separation distances — and how to correct each one.
Why string fuses blow and SPDs fail in solar DC combiner boxes, how to size gPV fuses correctly, how to read SPD status indicators, and how to replace both safely without creating new problems.
A safe, step-by-step method for testing solar PV strings — calculating expected Voc for temperature, checking polarity, measuring current with a DC clamp, comparing strings and recording results like a professional.
Why MC4-type solar connectors overheat, melt and let water in — cross-mating, poor crimping, loose nuts and strain — plus a step-by-step guide to correct assembly, testing and replacement.